Tell me why blood is red in color? The blood is red in color because the blood is made up red blood cells. The red color because of pigment is called hemoglobin.hemoglobin contains ions & oxygen to flow in whole body. Tell me why .videos children's encyclopedia 3d animation videos kids video show animation videos for children animation cartoons children educational videos. Kids Video show is a one stop show for educational videos for kids, nursery rhymes and kids general knowledge. Our Tell me Why is a series of kids educational videos. The channel is free with multiple video listings.